Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3211112c0de7490934b533b466cba794aabd05f8821ed43ae424383b23330ab' 
  AND token = 'L/5gLOzf29qPlE9AHQQh+qcbcD6KwuqWynCNAC1BA/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}